US2052578A - Glass feeder and method - Google Patents

Description

Sheets-Sheet 1 INV NTOR Sept,`l`, 1936. w. L. MCNAMARA GLASS FEEDER AND METHOD 1 Filed oct. 24, 1951 m wilg Sept. 1, 1936. w. L. MCNAMARA GLASS FEEDER AND METHOD Filed Oct. 24, 1931 5 Sheets-Sheet 2 MM mi l +P N Sept. 1 1936.

w. McNAMARA GLASS FEEDER AND METHOD 5 Sheets-Sheet 5 Filed Oct. l24, 1931 Sept. 1, 1936. vw. 1 .MCNAMARA 2,052,578

` GLASS FEEDER AND MTHOD Filed Oct. 24, 1931 5 Sheets-Sheet 4 Emi Mmmmmmm A@ ATTORNEY SePfl, 1936- v w. L. MNAMARA 2,052,578

GLASS FEEDER AND METHOD A Filed oct. 24, 1931 sweets-sheet 5 lim., HIII, Uh. ,l W" j .INN 1H vPatented Sept. q1, i936 ren s'rA'rEs 2,052,578 c GLASS FEEDER viiNn METHOD William L. McNamara, Connellsville, Pa., assignor to Capstan Glass Company, 4Gormellsville, Pa., a. corporation of Pennsylvania Application october 24, 1931, serial No. 570,833

29 Claims. (VCL 49-55) The lpresent invention relates to glass feeding devices, and more particularly to a glass feeder and method of feeding molten glass to fabricatf ing machines and the like. y

With the development of automatic glass maf chnery for molding containers of various shapes and sizes, glass feeders have been developed for delivering charges of glass to the fabricating machines.4 The most popular type of feederfcomprises, generally, a ow spout extending from theq side wall of a glass furnace adapted to receive and retain a shallow pool of molten-glass,

' a delivery orifice in the' bottom of the spout, and a needle `adapted to be reciprocated above the orifice to deliver successive charges of glass of suitable size and shape to the fabricating machines. tions -of the molten glass inthe Afeeder/spout, there is a tendency for thecharges delivered; to

vary in weight from time to time, which,gof

course, affects the weight of the vmolded article.

The requirement as to weight ofthe' latter is very rigid, and various devices have been -devised for regulating the weight of thev charges delivered so that theweight of the'resulting molded v ware will be within the prescribed limits. Many of these devices involve very complicated mechanisms with which even ,expert mechanics have `vconstant difficulty, and none of theml is entirely satisfactory. v y

An object of the present invention is to provvide a novel and simplemachine and method for accurately regulating` the weight of the charges delivered to keep the weight of the molded articles substantially constant, and within the prescribed limits 'of variation in the weight of the molded article. y 'Another object of the invention is to simplify the .means and method of regulating'the weight 40 of glass charges delivered by a feeder. Another object of the invention is to provide a simple means and methodfor controlling the operation of the feeder.

Another object ofthe invention is to provide an accurate means and method of regulating the heat applied to the glass in the feeder spout, thereby to minimize the changes in the coni dition 'of the glass and the resulting variations in the weight of the charges delivered.

Another object of the invention is to provide convenient, simple and accurate means of changing th'e amount' of heatapplied to the glass in the feeder spout in very small increments.

Another object of the invention-is to provide .55 a. plurality of regulating means for controlling Due to unavoidable changes in condithe weight of the glass delivered, one of which is adapted to effect very slow changes in the l.weight of the charges delivered, and another of `which isV adapted to effect very rapid changes Pin the weight of the glass charges delivered. 5

- Another object ofthe invention is to increase the rate of production of glass feeders and fabricating machines by minimizing the changes necessary for regulating the weight of the charges delivered, Vand simplifying the mechanisms for 10 v effecting the infrequent changes.

A further object of the invention is the provision of simplified means fcroperating' the needle and shear mechanisms forming a part of the glassl feeder, and to provide simple means 15 of adjusting the needle and shears, particularly during the change-over from one size and-shape of ware to another.

Other and further objects of the invention will be obvious upon an understanding of the illustrated embodiment about to'be described or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice. A preferred embodiment of theinventlon has been chosen for purposes of illustration and description and is shown in the accompanying drawings, wherein Fig. 1 is a longitudinal sectional view of a glass 30 feeder showing the feeder spout and charge feeding mechanism;

Fig. 2 is a top plan view, partly in section, of the feeder spout and mechanism for feeding the charges of glass;

Fig. 3 isa sectional view along the lines 3-3 of Fig. 2;

Fig. 4 is'a sectional view along the lines 4-4 of Fig. 1; v

y Fig. 5 is a side velevational view of the shearing 40 mechanism illustrating the mounting and adjustment thereof;

Fig. 6 is a sectional view along the lines 6 6 of Figs. 1 and 5`; and

. Fig. 'lv is a sectional-view of the mechanism'for 45 controlling the amount of fuel delivered to the burner to regulate the temperature of the molten glass in the flow spout.

Described generally. an apparatus lillustrating a. .preferred embodiment ofthe invention may comprise a spout extending from the usual glass furnace having an orifice at the bottom thereof through which the glass charges are delivered. A suitable needle isv mounted in alignmentwith the orifice and vrec'lprocated vertically to expel charges of glass from the orice at predetermined intervals The needle is held in-pro'per alignment above Athe outlet orifice at all times and is reciprocated in a vertical plane by means of a suitable cam and lever mechanism. Another cam and lever mechanism, driven from a commonsource of power, operates a pair of shears beneath the outlet orifice for severing the stream of glass as the successive charges are formed and suspended beneath the outlet. The position of the shears, as well as the position of the needle,

may be adjusted to and from the outlet orifice if" desired. A f

A suitable motor is adapted to drive the needle operating mechanism,4 the shears and fabricating machine, and in some cases the motor drive may be utilized to vcontrol and time the operation of the fabricating machine. When the operator observes that the weight of the glass charges delivered are approaching the prescribed limit of variation, it is necessary to make a rapid change to bring the charges to the proper weight. In the present embodiment, this may be obtained either by adjusting the position of the needle or by changing the. speed ofthe driving motor which controls the speed of the needle,` the shears and the fabricating machine. The speed of the motor should be adjustable so that thel speed thereof may be changed accurately in small increments. A decrease in the speed will increase the size of the charges of glass by permitting the flow to continue longer for each charge, likewise,

. perature of the glass.

i crease the size of the charges delivered.

-to maintain the glass'at its proper temperature and to permit the speed of the machine to be brought back to its normal or desired rate.

While there are various forms of apparatus for pacticing the method described herein, a

preferred embodiment of the invention has been chosen for purposes of illustration and description, and to illustrate one way of practicing the method. Referring again to thev drawings, and

more4 particularly Figs. 1 and 2, there is shown the usual glass furnace I having a spout 2 projecting therefrom supported upon suitable standards 3 which are adjustable in height to hold the outer end of the spout at a proper elevation with respect to the furnace construction so that the glass 4 will flow from the furnace into the spout and maintain a substantially constant level therein. Preferably, a vertically movable gate V5 'is interposed at the junction of thel spout and Ifurnace to skim oil' the undesirable upper surface of the glass and to prevent impurities from entering the spout. In some cases, the gate may be spaced slightlyiromithe surface of the glass, but preferably. it extends downwardly into` Any suitable construction may be utilized vfor the spout, but Ias shown herein (see Fig.v4), a lower channel member 6 is provided' and has a `series of inverted channel members I closing the y upper side -thereof to provide an enclosed channel leading tothe nose 8 cfg/the spout. The ex- 2,052,579 lterior of the channel may be insulated by means ,and size of ,ware being fabricated.

of any suitable material such as insulation brick The nose 8 closing the end of the spout may comprise a bottom refractory bowl or member I9 having an aperture 20 at the bottom thereof. A

refractory cover member 2| may be fitted upon the top of the bowl I9 andhas an-aperture 22 therein through which a needle 24 projects. Suitable insulation 25 may be placed between the refractory members I9 and 2| and members 26 and 21, encasing the nose of the spout.

A suitable bushing" 29 may be removably mounted adjacent the outlet orice 20 by means of ring 30 and the clamping members 3| held in place/by the bolts 32.4 The purpose `ofthe bushing is to form a continuation of the orifice 20, generally o f reduced diameter so that the bushing may be removed and replaced to adjust the size ofthe orifice to correspond'with the type While various mechanisms may be utilized for mounting the needle 24,v the preferred embodiment shown in the drawings utilizes a, sleeve 34 mounted adjacent to the casing 26 which serves as a guide for a shaft 35 extending through the sleeve. The shaft 35 has a threaded bore therein adapted to receive a second shaft 36 which is threaded to cooperate with the threads in the bore of the shaft 35. An arm 31 is secured to the upper end ofthe shaft 36 by a bolt 38 and extends over the aperture 22 to support thev needle 24. The needle may be secured to the arm 3l in any suitable mannen As shown, theupper endof the needle is shaped to lt into a recess 33 at the end ofthe arm and is held in position by clamp members 39 secured to the arms by means of suitable bolts.

For the purpose of adjusting the needle vertically, there is provided a threaded collar 40 in engagement with the threaded shaft 36 and rotatably mounted on-'the shaft 35 by means of la collar 4I threaded to the shaft 35. Afhand wheel 28 facilitates rotation of the collar 40,which in turn raises and lowers the threaded shaft 35 and the needle 24- with respect to the shaft 35..

Preferably, the needle 24 is operated by means of a cam 42 secured to a cam shaft 43 by meansI of'bolts 44. The cam 42 operates the needle through the intermediation of a cam roller 45 on lever 46 pivoted to the sleeve 34 at 4l, and link` 9 and asbestos lining I3 or the like, which in away from the outlet-orifice 2D. By moving thek shaft 5I upwardly, the needle 24 reciprocates closer to the orifice anddownward movement of the shaft 5I makes the needle reciprocate at a .further distance from the orifice. In thismanner,

position.

the charges of glass suspended from the orifice' may be pivoted upon a bracket 56 mounted adjacent to the lower casing 26 of the spout (see Figs. and 6). A shaft 51 extends through a suitable bearing 58 in a supporting member 59, and the shear blades 60 are mounted in suitable bearings in the supporting member 59 by means of bolts 6| so that the shear blades may be oscillated in a horizontal plane to sever the stream of glass. The opposite end of the supporting member 59 is held in position by means of a pair of bolts 64 and 65, which permit the member 59 to be rotated about the shaft 51 land fixed in any desired This in turn moves the shear blades up and down with respect to the outlet orice 20 so that the shears may operate in any desirable plane.l While the shears may be -of any suitable construction, preferably the cutting parts 66 of the blades are V-shaped so that the tendency toY displace the stream of glass from its natural line of iiow is minimized.-

Any suitable means may be utilized for operaty ing the shear blades, but as illustrated herein, an

adjustable link 68 is pivotally. connected to a bell crank lever 69 pivoted at' 10 and having a cam -roller 1| engaging a cam 12 mounted upon the drive shaft 43. A spring 14 operating through 'link 15 attached to one ofthe shear blades tends sufficiently to effect any .desired change. These to retain the shear blades in closed position and to hold the cam roller against the cam 1,2. The

' shear blades 60 are operatively connected to each other through the gears 16, as illustrated more .particularly in Fig. 6. The charges of glass 11 from the flowing stream fall into suitable molds on the fabricating machine 18, (-Fig. 3) which may be any convenient distance below the shearing mechanism.

. The drive shaft 43 is preferably operated by means of an electric motor 80 through the intermediation of a reduction gear 8|, and a coupling 82. The motor 80, in addition to operating the shears and `theneedle, also operates,or at least times, the `fabricating machine 18 so that the needle, the shears and the fabricating machine will all be operated in'synchronous relation to each other. The present invention contemplates a veryaccurate speed control for the motor 80 which is adapted to increase or decrease the speed of the motor in very small increments, thereby increasing or decreasing the weight of the charges fed to keep the fabricated articles within the prescribed limits of variation. Fr this purpose there is provided a pair of rheostats 83 and 84 to secure accurate adjustments in the speed of the motor in small increments ,(see Fig'. 2)` Preferably, one of the rheostats is adaptedv to adjust the speed in relatively large increments while the other is adapted to make relatively small adjustments so that by the combination of the two-rheostats the speed of the motor may be changed adjustments are accurate regardless of how small or how large the size of the charges delivered. The rheostats are adjusted in the usual way and suitable pointers 85y indica-te their position.

, Likewise, the rheostats are preferably connected in4 series with the field circuit .88 of the motor,

while the i'leld circuit is connected through the rheostat to the power line 86 outside-of the motor and tothe power line 81 inside of the motor.

By means of the speed control or by use of 'the hand wheels 29 and 54, the weight of the charges fed may be changed instantaneously, butsuch a change. indicates', particularly where it is subspout is not satisfactory. The present invention contemplates avery accurate burner control t0 permit the amount ofheat applied to the glass inthe spout to be changed from time to time in very small increments to keep the glass at the same temperature and in the same operating conditions at all times. For this purpose, a pair of burners l changed up or down by means of the hand wheel l vglass in the spout.

94 are provided which are inserted through the side walls of the spout adjacent the needle thereof', so that the flame is most effective on the glass adjacent the outlet (see Figs. 1, 2 and 7). In

its path to the stack I4, the flame passes over the surface of the glass and is effective on all the i The fuel to the burner is delivered from a suitable source by a' pipe or conduit 95 and passes through a control mechanism 96 into a conduit or pipe 91 leading to the burners 94'. The control mechanism 96, shown in Fig. 7, preferably comprises a member or plate 93 bolted to another member 98 with a disc 99therebetween. The disc 99 is mounted upn a shaft |00 which has an arm |0'| for rotating the disc 99. The disc 99 is provided with a series of apertures |02 which are very accurately drilled and graduated inA size, so that upon rotation of the disc in one direction, the apertures presented to register with the gas inlet, will decrease in size and when rotated in the opposite direction will increase in size. A member |04, held in place by the spring |05, tends to maintain a tight i'lt between the parts and to prevent the escape of gas.

To avoid the improper registry of the apertures |02 with the conduits, there is provided a plate |96 bolted to the member 98, having apertures |01 therein adapted to 'seat a pin |08. A spring |09 presses the pin against the apertures to hold the disc 99 in proper position. To move the disc from one position to another, the handle ||0 is pulled out to dlsengage the pin |08`from the apertures |01, and the arm |0| is rotated to i increase or decrease the burner opening to makF the desired change. It will be understood, however, that the apertures |01 are properly marked so that the operator knows exactly the size of aperture registering with the gas conduit. In addition to controlling the fuel to the burner, the draft control may be regulated by adjusting the damper or cover I5 on the stack |4.

In the operation of the feeder, the gate 6 is adjusted to hold back the upper surface of the glass. The furnace, being large as compared with the spout, provides a substantially constant level of glass in the spout. The motor 80 rotates continuously and drives the cam shaft 43 through the speed reducing mechanism 8|. The camv 4,2 on the cam shaft 43 reciprocates the needle 24 vertically over the orifice 20 by means of the levers 46, 46 and 49. sleeve 34, and arm 31. The position of the needle relative to the orifice may be 28 which -adjusts the needle with respect to the sleeve 34, or by means of the hand wheel 64 which .adjusts the position of one end of the lever 49.

The cam 12, on the cam shaft 43, is operatively connected to the shearing mechanism by means of cam roller 1|, bell crank 69 and the adjustable link 68. The shears may be moved up or down by means of the bolts 64 and 65. 'Ihe shear blades60 are geared to each other as shown more particularlyin Fig. 6, so that the operation of one v blade by means of the link 68 likewise operates the other. 'Ihe motor 80 also drivesV or times the operation of the fabricating machine 18. In this way. the needle, the shears and the fabricating machine are always kept in the same timed relaoperating rate so that production is not ma' terially affected by'the slight changes in speed, the burners 94 are provided for heating theglass inthe spout. The fuel delivered to these burners is accurately controlled by meansof the mechanism shown in Fig. 7, and by rotating the disc 99 through thehandle H0, the temperature of the.

glass in the spout may be increased or decreased so that its proper working condition is maintained.vand the speed of the, machine is kept normal. l n

It will be understood, of course, that the regulation of the weight of the charges may also be made, if desired, by changing the position bf the needle. with 'respect to the outlet orifice.

During change-overs from one size and shape of ware to another, it' is usually customary to change the orifice bushing 29.by removing the clamping members 3| and by substituting another orifice bushing having an outlet oriiice therein of the proper size to give the weight of glass desired. At the same time the position of the needlemay be changed to give the proper operating characteristics. In some cases, also. it may be desirable to substitute a'new cam for the needle operating cam 42. These changes may be rapidly made by merely removing the bolts holding thecam. The operator ordinarily knows the shape of cam desirable for any particular type cf ware and the proper cam may be readily substituted in changing over from one type of ware to another.

It will be seen that the present invention provides a very effective method and'machine for feeding glass charges to fabricating machines by accurately regulating the speed of the driving motor which controls the needle operation, the

shear operation andthe .operation' of the fabricating machine. In this manner, the weight of the glass charges delivered may be Acontrolled accurately. IThe change of speed necessary seldom exceeds two per cent above or below normal speed, and by'increasing or decreasing the fuel applied to the burners effective upon the glass in the spout, the condition of the glass is maintained constant and the machine is operatedat itsI n ormal speed except for short intervals of time. The present method and means for controlling the weight of the glass charges delivered are exl tremely accurate, and yeliminate thecomplicated controls heretofore required in this connection.

The operator inspects and weighs the glass articles every few minutes, and if the weight varies from the standard.. a suitable adjustment of lthe speed of the motor 80 is made to correct this. In view of the .fact 'that the operating conditions f molten glass change very slowly, changesy in speed are seldom made within intervals of less than fifteen minutes of leach other. In some cases, the machine will run for an hour vor more without any adjustment whatever.44 The simplicity and accuracy of the control for the present feeder is a marked advancement in the art. The

. feeder is entirely mechanical and likelihood Iof repair and adjutxnent is reduced to a minimum. The feeder is i'iiilyl capable of standing 'the nou'gh acsasva usage to which it may be subjected, and may be readily operated by unskilled laborers. y

As various changes may be made in the form,

arrangement and construction of the various parts without departing from the spirit of theinvention, it is to be vunderstood that all matter herein is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim:

` 1. In a device of the class described, the combination of a feeder spout having an orifice therein,

a needle adapted to be reciprocated above said orifice, a sleeve mounted in substantially parallel lrelationship with said needle, members in said sleeve adapted tobe reciprocated, saidimembers being adjustable withI respect to each otherto` change theirv effective length and the position of the needle, means attached to said member adapted ,to support said needle, and means for reciprocating said member.

- 2. In a device of the class described, the combination of a feeder spout having an orifice therein, a pair of shears mounted below said orifice, and a pair of opposed bolts effective upon both of said shears adapted to adjust the'vertical positionof said shears simultaneously to change the plane of shearing without changing the position of the shears with respect to each other.

3. In a device of the class described, the combination of a feeder spout having an orifice therein, a shaft extending substantially horizontallybeneath said spout, a pair of shears pivoted on said shaft, a'nd a single pair of bolts'for adjusting the vertical position of said shears about said pivot to change the plane of shearing.

4. In a device of the class described, the combination of a feeder spout, a pair of shears geared to each other and mounted beneath said spout, resilient means attached to one of said shears tending to retain said shears in closed position, an adjusable arm, attached toone of said shears,

and .cam operated means connected to said ad-v justable arm foroperating said shears.

5. In a, device of the class described, the combi-4 lnation of a receptacle for delivering charges of glass, a burner for controlling the temperature of the glass in said receptacle, a rotating disc having a series of accurately gauged apertures therein for regulating the weight of the charges v delivered by controlling the supply of fuel to said burner, and means for rotating said disc to increase or decrease the amount of fuel delivered to said .burner thereby to regulate the weight ofcharges delivered;

7. In a device of the class described, the combination of a receptacle for delivering charges of molten glass, aburne'r for controlling the temperature of said molten glass, a conduit leading to said burner devices for controlling the weight 'of the charges of glass delivered comprising, a

rotatable disc having accurately gauged apertures therein associated vwith said conduit for controlling the amount of fuel passing therethrough, a second disc having a plurality of apertures therein, an arm for rotating said first disc to control the amount of fuel delivered to said burner, vand a member resiliently retained against said second disc to engage the apertures there, in, thereby to position the desired aperture in the first disc to register with said conduit.

8. In a device of the class described, the combination of ay feeder spout having a delivery oriiice therein, a burner for controlling the temperature of glass in said spout, a fuel conduit leading to said burner, a disc having accurately gauged apertures therein adapted to control the' fuel passing through said conduit by selection of the proper size of aperture to register therewith, and astack adapted to regulate the draft in said spout for co-operating with-said burner in regulating the temperature of the glass and in accurately controlling the lweight of the. glass charges being delivered.

- '9. A device of the class described for feeding 'charges of glass of substantially constant weight,

ered, and a fuel control forsaid burner adapted to -change the amount of fuel delivered to the burner in small increments vwhen the speed of the feeder varies materially from itsproper speed,

- thereby to co-operate with said speed changing device for accurately controlling the weight of the charges of glass delivered without substantial changes in speed. l l

l0. The method of feeding glass charges of substantially constant weight, as required commercially, which method comprises maintaining the relative time sequence of the several operations of the feeder, 'and changing the speed of the feeder operations in small increments to regulate accurately the weight of the charges delivered.

11. The method of maintaining the weight 'within' commercial limits of charges delivered by glass feeders, which method comprises maintaining the same phase operating relation between the several operating mechanisms of the feeder, i

and changing the speed of the said several operating mechanisms in small increments to regulate accurately the weight of the glass delivered.

12. The method of maintaining substantially constant the weight of glass delivered by glass feeders, which method comprises operating the several parts of the feeder mechanism and the fabricating machine from a common drive, and f maintaining the weight of the glass delivered substantially constant by changing the speed of said drive in small increments.'`

13. The method of maintaining the weight of glass delivered by a needle feeder within commerincrements to maintain the weight of the glass mental changes in thefuel supplied, the amount of vheat applied to effect slow changes in the weight of the glass charges delivered, and regulating in small increments the speed of the glass feeder -to make relatively rapid changes in the weight of the charges of glass delivered.

15. In a device of the class described, the combination of a feeder spout having an orifice therein, a needle mounted above said orifice, a threaded member substantially parallel to said needle, an arm attached to said threaded member for supporting said needle, means adapted to reciprocate said threaded member, a threaded column attached to 4said means for adjustably mounting said threaded member thereon to adjust the position of the needle supporting arm and, a sleeve adapted to receive and support said means and to permit reciprocation thereof.

16. In a device of the class described, the combination of a feeder spout having an orifice therein, a needle mounted above said orifice, a threaded member substantially parallel to said needle, an arm attached to said threaded member' and adapted to support said needle, a hollow member adapted to receive said threaded member, a collar secured to the end of said hollow member and in threaded engagement with said threaded member whereby the collar may be rotated to change the combined effective length of said threaded member and said hollow member, a sleeve for guiding said hollow member in its vertical recip-V of rheostats operatively connected in series for 1 accurately changing the' speed of said motor in small increments to regulate the weight of the glass delivered by said feeder, a burner for controlling the temperature of the glass in said spout, a fuel conduit leading to said burner, a disc having accurately vgauged apertures therein adapted to control the fuel passing through said conduit by the selection of the proper sizeof aperture to register therewith, whereby said disc may be rotated to change the amount of fuel fed to said burner in small increments and thereby permitting said feeder to operate at its proper speed.

18. In a device of the class described, the combination of a glass feeder, a fabricating machine adapted to receive the charges of glass delivered by said feeder, a common means for driving said feeder and said fabricating machine and maintaining their operations in the same phase relationship,- means for accurately changing the speed of said driving means in small increments to makel relatively rapid changes inthe weight of the glass delivered to maintain said weight substantially constant, and a burner for controlling the temperature of the glass being delivered, a rotating disc having accurately gauged-apertures therein for controlling the amount of fuel delivered to said burner, whereby said disc may be rotated to effect relatively slow changes in the weight of the glass charges delivered and to permit the operation of the feeder and the fabricating machine at their proper rate. 19. The method of regulating the weight of glass charges delivered by a glass feeder, which method comprises making relatively vrapid changes in the weight of the glass delivered by changing the operating speed of said feeder to maintain the charges of proper weight, applying heat to the glass in the feeder and maintaining.

the normal operating speed of the feeder by increasing or decreasing the amount of heat applied to the glass in the feeder to make 'relatively slow changes in the weight of the glass delivered when the operating speed has increasedv or decreased substantially two per cent from the desired operating speed, 'wherebythe changes in speed for correcting the weight of the glass as av result ofA the change in temperature will bring the feeder back to its normal operating speed.

` 20. The method of regulating the weight of glass charges delivered-by a glass feeder, which method comprises maintaining the phase relationship of the operations of the several feeder mechanisms substantially constant, .making relatively rapid changes in the weight of the glass Adelivered by changing `the operating speed of said feeder, applying heat to the glass in the feeder, and maintaining the normal operating speed of the feeder byvincrea'sing or decreasingv the amount of heat applied to the glass in the feeder to make relatively slowl changes in the weight of the glass delivered when the operating speed has increased or decreased materially from the desiredoperating speed so that the changes in the speed of the machine necessary forl correcting for the change in temperature will bring the operating speed back to normal.

21. The method of feeding glass charges of substantially constant weight, which method comprises regulating the speed of the feeder and the fabricating machine tocontrol the weight of the charges delivered and when the speed varies a predetermined amount from the normal or desired speed, changingthe temperature of the glass so -that the speed of the feeder may be brought back to the normal operating speed.

22. The method of maintaining proper operating conditions in the molten glass of a glass feeder which would normally deliver charges of glassy varying in weight from time to time, which method comprises maintaining the same phase relationship between the several operating parts of the feeder, maintaining the weight of the glass charges delivered substantially constant by changing the'speed of the feeder, and changing i and having different graduations for accurately controlling the vspeed of said common drive in small increments to regulate the vweight of glass- 4delivered within prescribedJimits of variation,

24. The method of maintaining proper operating conditions in the molten glass of a glass-feeder which would normally deliver charges of glass varying in weight from time to time, which method comprises maintaining the weight of the glass charges substantially constant by changing the speed of the feeder, and changing the temperature of the glass in small increments in accordance with changes in the-feeder speed.

25. In a device for manufacturing glass articles of substantially uniform weight, the combination of a glass feeder adapted to deliver charges of molten glass, a fabricating machine adapted to receive the charges delivered by said feeder. interconnecting means for driving said feeder and said fabricating machine at the same speed and phase I relationship, devices for regulating the weight of the glass charges delivered comprising a motor for operating said feeder and said fabricating machine, a pair of rheostats in series and operatively connected to the motor circuit for making incremental changes inthe speed of the motor and in the speed of the fabricating machine to increase and decrease the weight of the charges delivered .by incremental amounts and therebymaintain the weight of the charges delivered by the feeder substantially constant.

- 26. In a device of the class described, the combination of a feeder for delivering glass to a fabricating machine, a fabricating machine, a drive for said feeder and said fabricating machine, devices for regulating theweight of the charges of glass delivered comprising a rheostat with relatively large resistance steps and a rheostat in series therewith having relatively small resistance steps for accurately controlling the speed of said drive in small increments to regulate the weight of the glass charges delivered, a burner adapted to control the temperature'ofV said glass,. and "means for controlling the flow of fuel to said `l burner to increase or decrease the temperature lof the glass when the driving speed has varied a predetermined'amount above or below the normal operating rate.

27. The method of feeding glass charges of substantially constantl weight to fabricating ma. chines, which method comprises maintaining the same phase relationship between the operation ofk the shears, needle and fabricating machine, maintaining constant weight of the charges delivered by making relatively small changes in the speed of said shears, needle and fabricating machine without changing their phase relationship, and maintaining the speed of the needle shears and fabricating machine substantially constant by changing the temperature of the glass to permit the speed to be brought back to normal when the speed has been changed a predetermined amount from the normal speed.

28. .In a device of the c lass described, the com- Ibination vof a feeder spout having an orifice therein, a needle mounted above said orifice, a

threaded member substantially parallel to said needle, an arm attached to said threaded member for supporting said needle, means adapted to reciprocate said threaded member.- a threaded col-` umn attached to said means for adjustably mounting said threaded member thereon to ad- -just the position vof the needle supportingarm, a

sleeve adapted to receive and support said meansand to permit reciprocation thereof, a pair of shears for severing the glass below said orifice, a motor for operating said shears and reciprocating said needle, and a pair of rheostats operatively connected in series-4 and operatively connected in the motor circuit to make small incremental changes in the speed .offsaid motor to maintain the weight of the glass delivered bythe feeder substantially constant by said changes in speed.

29. In a device of theclass described, the comblna'tion of a. feeder spout having an orifice] therein, a needle mounted above said orifice, av

threaded member substantially lparallel to saidneedle.' an arm attached to said threaded mem- Y ber for supporting said needle, means adapted to reciprocate said threaded member, a threaded column attached to said means for adjustably mounting said threaded member thereon to adjust theposition of the needle supporting arm, a sleeve adapted to receive and support said means and to permit reciprocation thereof, a pair of shears for `severing the glass below said orifice, a motor for operating said shears and reciprocating said needle, a pair of rheostats operatively connected in series and operatively connected in the motor circuit to make small incremental changes in the speed of said motorto maintain the weight of the when the speed has increased or decreased a pre- 10 determined amount.

WILLIAM L. MCNAMARA.

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